bug(presto): tableDDL throws UnsupportedOperationException (wrong override signature)

Description

PrestoMetaData defines a 3-arg tableDDL(String, String, String) returning "", but DefaultMetaService has no such signature — the framework calls the 4-arg tableDDL(Connection, String, String, String) (which the base throws UnsupportedOperationException for). So viewing/exporting a Presto table's DDL throws instead of returning empty. The 3-arg method is dead code.

Location

chat2db-community-plugins/chat2db-community-presto/.../PrestoMetaData.java:7-9; base chat2db-community-spi/.../DefaultMetaService.java:72-73 (4-arg throws).

Impact

Presto table DDL view/export throws UnsupportedOperationException.

Suggested fix

Override the 4-arg tableDDL(Connection, String, String, String) to return "" (the 3-arg method's intent), instead of throwing.

Related existing

None.